問題詳情

      The plunging waterfalls and soaring crags chiseled by the Merced River draw millions of visitorseach year, but the crowds are precisely what threaten the waterway and the park. Efforts to safeguard theMerced have spawned a court battle over the future of development in Yosemite National Park’s mostpopular stretch. The case may come down to the challenge facing all of America’s parks: should theyremain open to everyone, or should access be limited in the interest of protecting them? In November, afederal judge barred crews from finishing 60-million-dollar construction projects in Yosemite Valley. Thejudge sided with a small group of environmentalists who sued the federal government, saying furthercommercial development would bring greater numbers of visitors, thus threatening the Merced’s fragileecosystem. The government is appealing, fearing the ruling could force the National Park Service to limitthe number of people allowed into Yosemite each day, a precedent it does not want to see echoed in otherparks. The case has Yosemite’s most loyal advocates sharply divided over how to balance preservationwith access to public lands. Even environmentalists cannot agree on how to minimize the humanfootprint—some believe cars should be kept out entirely; others say visitors should have to makereservations in advance. 
43 According to the passage, what threatens the ecosystem of Yosemite National Park?
(A) The Merced River
(B) The visiting crowds
(C) The plunging waterfalls
(D) The soaring crags

參考答案

答案：B
難度：適中0.586207
統計：A(3),B(17),C(5),D(2),E(0)

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